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Active YC Companies

5,056 Y Combinator companies with active status. Browse founder contacts, batch info, and company data.

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YC Company Directory

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Company	Batch	Description	Status	Location	Team	Site	Founders	Reveal
10x Science	W26	The AI-native platform for next-generation protein characterization.	Active	San Francisco, CA, USA	5		David Roberts, Andrew Reiter, Vishnu Tejus	Reveal
1code (21st.dev)	W26	Orchestration layer for coding agents	Active	San Francisco, CA, USA	3		Serafim Korablev, Sergey Bunas	Reveal
21st	W26	UI building blocks for the agentic internet	Active	San Francisco, CA, USA	3		Serafim Korablev, Sergey Bunas	Reveal
Aemon	W26	The Forward-Deployed AI Research Engineer	Active	San Francisco, CA, USA	3		Richard Zhou, Ray Xu	Reveal
Agentic Fabriq	W26	The control plane for AI agents.	Active	San Francisco, CA, USA	2		Paulina Xu, Matthew Xu	Reveal
Alt-X	W26	Building the best venue for private markets exposure.	Active	Los Angeles, CA, USA	2		Ryan Samadi, Michael Wachsman	Reveal
Approxima	W26	Your software should build itself.	Active	Toronto, ON, Canada	2		Ethan Pronev, Ashish Selvaraj	Reveal
Arcline	W26	Startup legal work handled by elite lawyers & same-day turnaround	Active	—	5		Pamir Ehsas, Stefan Mandaric	Reveal
ARC Prize Foundation	W26	AI benchmarks that measure general intelligence and inspire new ideas	Active	San Francisco, CA, USA; Remote	4		Greg Kamradt	Reveal
Arzule	W26	AI for B2B Partnerships	Active	San Francisco, CA, USA	2		Jeffrey Lin, Nikhil Reddy	Reveal
Ashr	W26	Automated Multi-Modal Testing for Agents	Active	San Francisco, CA, USA	2		Shreyas Kaps, Rohan Kulkarni	Reveal
Asimov	W26	Real-world human movement data for humanoid robots	Active	San Francisco, CA, USA; Remote	3		Lyem Ningthou	Reveal
Aurorin CAD	W26	Claude code for Mechanical Engineers	Active	San Francisco, CA, USA	1		Michael Baron	Reveal
AutoSitu	W26	The AI operating system for the built world	Active	—	2		George Zhai, Xuanshu (Asher) Lin, Asher Lin	Reveal
Autumn AI	W26	Stalk your prospects at scale.	Active	San Francisco, CA, USA	2		Shiv Kampani, Vishnu Sampathkumar	Reveal
Avoice	W26	Harvey for Architecture	Active	—	4		Chawin Asavasaetakul, Chawit Asavasaetakul, Chawin Asavasaetaku	Reveal
AxionOrbital Space	W26	Foundation models for 24/7 Earth Observation	Active	San Francisco, CA, USA	2		Atharva Peshkar, Dhenenjay Yadav	Reveal
Balance	W26	Full-Stack AI Accounting	Active	London, England, United Kingdom	4		Mathias Løvring, Gus Levinson, Emil Munk	Reveal
Beacon Health	W26	AI Agents for Primary Care	Active	New York, NY, USA	2		Obinna Akahara, Mark Pothen	Reveal
Beacon Health	W26	AI Employees for Primary Care	Active	San Francisco, CA, USA	2		Mark Pothen, Obinna Akahara	Reveal
BeeSafe AI	W26	Frontier AI Defenses for Social Engineering Attacks	Active	San Francisco, CA, USA	3		Daniel Spokoyny, Ariana Mirian, Nikolai Vogler	Reveal
Beyond Reach Labs	W26	Space solar arrays that grow to the size of a football field in orbit	Active	New York City, NY, USA	8		Mitchell Fogelson, Pele Collins	Reveal
Beyond Reach Labs	W26	Space solar arrays that grow to the size of a football field in orbit	Active	—	2		Pele Collins, Mitchell Fogelson	Reveal
Bidflow	W26	AI Takeoffs for Electrical	Active	New York City, NY, USA	2		Jesse Choe, Gautham Ramachandran	Reveal
Booko	W26	Dynamically pricing the whole economy.	Active	San Francisco, CA, USA	2		Will Hall, Arjun Saluja	Reveal
Bubble Lab	W26	Operating system for premium professional communities	Active	San Francisco, CA, USA	2		Selina Li, Zach Zhong	Reveal
Burt	W26	Easily fine tune and deploy specialized models	Active	San Francisco, CA, USA	2		Kurt Sharma, Bobby Zhong	Reveal
Button Computer	W26	The tiny computer built for voice AI.	Active	San Francisco, CA, USA	1		Chris Nolet	Reveal
Byteport	W26	Global upload acceleration for 1GB-100TB files.	Active	San Francisco, CA, USA	1		Jayram Palamadai	Reveal
Byteport	W26	Global upload acceleration for 1GB-100TB files.	Active	San Francisco, CA, USA	4		Jayram Palamadai	Reveal
Cajal	W26	Scaling formal verification to accelerate scientific discovery	Active	San Francisco, CA, USA	2		Pedro Nobre, Luke Johnston	Reveal
Canary	W26	The first AI QA engineer that understands your codebase	Active	San Francisco, CA, USA	4		Viswesh N G	Reveal
Canary	W26	The first AI QA engineer that understands your code	Active	San Francisco, CA, USA	2		Aakash Mahalingam, Viswesh N G	Reveal
Captain	W26	Self-tuning file search for AI agents	Active	San Francisco, CA, USA	2		Lewis Polansky, Edgar Babajanyan	Reveal
Cardboard	W26	Agentic video editor	Active	San Francisco, CA, USA	5		Saksham Aggarwal, Ishan Sharma	Reveal
Caretta	W26	Realtime AI for Sales Calls	Active	San Francisco, CA, USA	4		Kayra Bahadir, Omar Elamin, Pavlos Markesinis	Reveal
Caretta	W26	Realtime AI for Sales Calls	Active	San Francisco, CA, USA	4		Kayra Bahadir, Omar Elamin, Pavlos Markesinis, Kayra Bahadır	Reveal
Cascade	W26	Distilling Proprietary Intelligence	Active	San Francisco, CA, USA	2		Adam AlSayyad, Haluk Cem Demirhan	Reveal
CatchBack Cards	W26	The most thrilling way to create and rip digital collectible packs	Active	San Francisco, CA, USA	7		Joseph Zhang, Sophia Kim	Reveal
CellType	W26	The agentic drug company. We simulate human biology.	Active	New York City, NY, USA	2		David van Dijk, Ivan Vrkic, David van Dijk	Reveal
CellType	W26	The agentic drug company. We simulate human biology.	Active	New York, NY, USA	2		David van Dijk, Ivan Vrkic	Reveal
Chamber	W26	The AIOps Agent for ML Teams	Active	Seattle, WA, USA	4		Charles Ding, Andreas Bloomquist, Jason Ong, Shaocheng Wang	Reveal
Chamber	W26	Autopiloting your AI infrastructure	Active	San Francisco, CA, USA	4		Charles Ding, Andreas Bloomquist, Jason Ong, Shaocheng Wang	Reveal
Chasi	W26	AI Revenue Engine for the Equipment Industry	Active	New York, NY, USA	2		Akash Pavan, Sarman Aulakh	Reveal
ClaimGlide	W26	AI automated prior-auths for private medical practices	Active	Seattle, WA, USA	1		Nami Lindquist	Reveal
CodeWisp	W26	Anyone can create real games with AI	Active	San Francisco, CA, USA	3		Elvin Fu	Reveal
Coevolved	W26	Agents for Mortgage Origination	Active	—	2		Alex Li, Athan Zhang	Reveal
Cofia	W26	AI automations that implement themselves	Active	New York City, NY, USA	3		Moses Wayne, Paola Martinez	Reveal
Compresr	W26	LLM context compression for better accuracy	Active	San Francisco, CA, USA	4		Ivan Zakazov, Berke Argin, Kamel Charaf, Oussama Gabouj	Reveal
CO Condor Energy	W26	Energy system enabling reliable, cheap and sustainable electricity…	Active	—	3	—	Jean Costa de Beauregard, Clément Grivel, Florian Pérocheau	Reveal